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%I #13 Sep 08 2022 08:46:00
%S 3,28,303,3328,36603,402628,4428903,48717928,535897203,5894869228,
%T 64843561503,713279176528,7846070941803,86306780359828,
%U 949374583958103,10443120423539128,114874324658930403,1263617571248234428
%N (5*11^n+1)/2.
%H Vincenzo Librandi, <a href="/A199754/b199754.txt">Table of n, a(n) for n = 0..900</a>
%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (12,-11).
%F a(n) = 11*a(n-1)-5.
%F a(n) = 12*a(n-1)-11*a(n-2).
%F G.f.: (3-8*x)/((1-x)*(1-11*x)).
%t (5 11^Range[0,20]+1)/2 (* or *) LinearRecurrence[{12,-11},{3,28},20] (* _Harvey P. Dale_, Apr 12 2022 *)
%o (Magma) [(5*11^n+1)/2: n in [0..30]];
%K nonn,easy
%O 0,1
%A _Vincenzo Librandi_, Nov 10 2011
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